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4chan archive thread image downloader for general use across many foolfuuka based imageboards. Downloads all images individually in a thread with original filenames (by default). Optional thread API button, for development purposes.
// ==UserScript==
// @name 4chan Archive Image Downloader
// @namespace Violentmonkey Scripts
// @match https://archive.4plebs.org/*/thread/*
// @match https://desuarchive.org/*/thread/*
// @match https://boards.fireden.net/*/thread/*
// @match https://archived.moe/*/thread/*
// @match https://thebarchive.com/*/thread/*
// @match https://archiveofsins.com/*/thread/*
// @match https://archive.alice.al/*/thread/*
// @match https://arch.b4k.co/*/thread/*
// @match https://archive.palanq.win/*/thread/*
// @grant GM_download
// @grant GM_registerMenuCommand
// @version 1.4.2
// @license The Unlicense
// @author ImpatientImport
// @description 4chan archive thread image downloader for general use across many foolfuuka based imageboards. Downloads all images individually in a thread with original filenames (by default). Optional thread API button, for development purposes.
// ==/UserScript==
/* EDIT BELOW THIS LINE */
// User preferences
var indiv_button_enabled = true;
var api_button_enabled = false;
var keep_original_filenames = true; // Prioritized above archive_filenames
var archive_filenames = true; // Only used if keep_original_filenames is false. If so, archive names will be saved; otherwise, 4chan names will be saved.
var confirm_download = true;
var download_limit = 3000; // speed in milliseconds to delay
var named_poster_media_download_only = false;
var named_poster_tag_in_filename = false; // Only used if named_poster_media_download_only is true
/* EDIT ABOVE THIS LINE */
(function() {
'use strict';
// Constants for later reference
const top_of_thread = document.getElementsByClassName("post_controls")[0];
const thread_URL = document.URL;
const archive_site = thread_URL.toString().split('/')[2];
const url_path = new URL(thread_URL).pathname;
const url_path_split = url_path.toString().split('/')
const thread_board = url_path_split[1];
const thread_num = url_path_split[3];
// checking URL console
/*
console.log(url_path_split);
console.log(url_path);
console.log(thread_URL);
console.log(thread_URL.toString().split('/')[2]);
*/
const api_url = "https://" + archive_site + "/_/api/chan/thread/?board=" + thread_board + "&num=" + thread_num; // important
//console.log(api_url)
// Individual thread image downloader button
var indiv_dl_btn;
var indiv_dlbtn_elem;
var indivOriginalStyle;
var indivOrigStyles;
if (indiv_button_enabled){
indiv_dl_btn = document.createElement('a');
indiv_dl_btn.id = "indiv_btn";
indiv_dl_btn.classList.add("btnr", "parent");
indiv_dl_btn.innerText = "Indiv DL";
top_of_thread.append(indiv_dl_btn);
indiv_dlbtn_elem = document.getElementById("indiv_btn");
indivOriginalStyle = window.getComputedStyle(indiv_dl_btn);
indivOrigStyles = {
backgroundColor: indivOriginalStyle.backgroundColor,
color: indivOriginalStyle.color,
}
}
// API button for getting the JSON of a thread in a new tab
var api_btn;
var api_btn_elem;
if (api_button_enabled){
api_btn = document.createElement('a');
api_btn.id = "api_btn";
api_btn.href = api_url;
api_btn.target = "new";
api_btn.classList.add("btnr", "parent");
api_btn.innerText = "Thread API";
top_of_thread.append(api_btn);
api_btn_elem = document.getElementById("api_btn");
}
function displayButton (elem){
console.log(elem);
var current_style = window.getComputedStyle(elem).backgroundColor;
//console.log(current_style); // debug
var next_style;
const button_original_text = {"indiv_btn": "Indiv DL"};
const button_original_styles = {"indiv_btn": indivOrigStyles};
const confirmStyles = {
backgroundColor: 'rgb(255, 64, 64)', // Coral Red
color:"white",
}
const processingStyles = {
backgroundColor: 'rgb(238, 210, 2)', // Safety Yellow
color:"black",
}
const doneStyles = {
backgroundColor: 'rgb(46, 139, 87)', // Sea Green
color:"white",
}
const originalStyles = {
backgroundColor: button_original_styles[elem.id].backgroundColor, // Original, clear
color: button_original_styles[elem.id].color,
}
// Button style switcher
switch (current_style) {
case 'rgba(0, 0, 0, 0)': // Original color
next_style = confirmStyles;
elem.innerText = "Confirm?";
break;
case 'rgb(255, 64, 64)': // Confirm color
next_style = processingStyles;
elem.innerText = "Processing";
break;
case 'rgb(238, 210, 2)': // Processing color
next_style = doneStyles;
elem.innerText = "Done";
break;
case 'rgb(46, 139, 87)': // Done Color
next_style = originalStyles;
elem.innerText = button_original_text[elem.id];
break;
}
Object.assign(elem.style, next_style);
}
// Retrieves media from the thread (in JSON format)
// If OP only, ignore posts, else get posts
function retrieve_media(thread_obj) {
var media_arr = [];
var media_fnames = [];
var return_value = [];
const OP = thread_obj[thread_num].op.media;
//console.log(OP); // debug
//If OP is a massive OP,
var OP_filename = (keep_original_filenames) ? OP.media_filename : OP.media_orig;
OP_filename = (!keep_original_filenames && archive_filenames) ? OP.media : OP_filename;
OP_filename = (named_poster_tag_in_filename && named_poster_media_download_only) ? String(thread_obj[thread_num].op.name+"_-_"+OP_filename) : OP_filename;
var OP_media_link = (OP.media_link == null) ? OP.remote_media_link : OP.media_link;
if (!named_poster_media_download_only || named_poster_media_download_only && thread_obj[thread_num].op.name != "Anonymous") {
media_arr.push(OP_media_link);
media_fnames.push(OP_filename);
}
// Boolean, checks if posts are present in thread
const posts_exist = thread_obj[thread_num].posts != undefined;
if (posts_exist) {
const thread_posts = thread_obj[thread_num].posts;
const post_nums = Object.keys(thread_posts);
const posts_length = post_nums.length;
//Adds all post image urls and original filenames to the above arrays
for (var i = 0; i < posts_length; i++) {
//equivalent to: thread[posts][post_num][media]
var temp_media_post = thread_posts[post_nums[i]].media;
//if media exists (and is from a named poster [non-anonymous poster] if option true),
//then push media to arrays
if (temp_media_post !== null && (!named_poster_media_download_only || named_poster_media_download_only && thread_posts[post_nums[i]].name != "Anonymous") ) {
var working_media_link = (temp_media_post.media_link == null) ? temp_media_post.remote_media_link : temp_media_post.media_link
var correct_media_fname = (keep_original_filenames) ? temp_media_post.media_filename : temp_media_post.media_orig;
correct_media_fname = (!keep_original_filenames && archive_filenames) ? temp_media_post.media : correct_media_fname;
correct_media_fname = (named_poster_tag_in_filename && named_poster_media_download_only) ? String(thread_posts[post_nums[i]].name+"_-_"+correct_media_fname) : correct_media_fname;
//console.log(working_media_link); //debug
//console.log(correct_media_fname); //debug
media_arr.push(working_media_link)
media_fnames.push(correct_media_fname);
}
}
}
// Adds the media link array with the media filenames array into the final return
return_value[0] = media_arr;
return_value[1] = media_fnames;
/*
var count;
function download_with_scope(){
GM_download(media_arr[count], media_fnames[count]) // downloads images
}
*/
function sleep(ms) {
return new Promise(resolve => setTimeout(resolve, ms));
}
async function download_images(){
for (var i=0; i<media_arr.length; i++){
//console.log(media_fnames[i] + " "+ media_arr[i]); //debug
//console.log(download_limit); //debug
await sleep(download_limit);
GM_download(media_arr[i], media_fnames[i]) // downloads images
}
}
download_images();
if(confirm_download){
displayButton(indiv_dlbtn_elem);
setTimeout(displayButton(indiv_dlbtn_elem), 3000);
}
}
// Gets the JSON file for the thread with the API
async function get_archive_thread() {
const API_response = await fetch(api_url);
const JSON_file = await API_response.json();
console.log(JSON_file); // debug
retrieve_media(JSON_file);
}
// Controls what the individual download button does upon being clicked
function indivDownload(){
displayButton(indiv_dlbtn_elem);
// Wait for user to confirm zip if didn't click fast enough for double-click
setTimeout(function(){
if (window.getComputedStyle(indiv_dl_btn).backgroundColor == 'rgb(255, 64, 64)'){
indiv_dl_btn.removeEventListener("click", displayButton);
indiv_dl_btn.addEventListener("click", get_archive_thread);
// If user does not confirm, reset the button back to original
setTimeout(function(){
indiv_dl_btn.removeEventListener("click", get_archive_thread);
indiv_dl_btn.addEventListener("click", displayButton);
Object.assign(indiv_dlbtn_elem.style, indivOrigStyles);
indiv_dl_btn.innerText = "Indiv DL";
}, 5000);
}
}, 501);
}
GM_registerMenuCommand("Download all thread images individually", get_archive_thread);
// Download thread button event listener(s)
if(confirm_download){
indiv_dlbtn_elem.addEventListener("click", indivDownload);
indiv_dlbtn_elem.addEventListener("dblclick", get_archive_thread);
}
else{
indiv_dlbtn_elem.addEventListener("click", get_archive_thread);
}
})();